Iethod of making hollow bars for stay-bolts



(No ModeL) W. B. WEIL.

METHOD OF MAKING HOLLOW BARS FOR STAY BOLTS.

No. 379,887. Patented Mar. 20, 1888.

R u T N E V N WITNESS as.

Unrrnn STATES PATENT OFFICE.

\VILLIAM B. WEIL, OF CLEVELAND, OHIO.

METHOD OF MAKING HOLLOW BARS FOR STAY-BOLTS.

SPECIFICATION forming part of Letters Patent No- 379,837, dated March 20, 1888.

Application filed December 30, 1887. Serial No. 259,372. (No model.)

To a ZZ whom it may concern.-

Be it known that 1, WILLIAM B. WEIL, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain Improvements in the Method of Making Hollow Bars for Stay- Bolts and Operate Means therefor; and I do hereby declare that the following is afull, clear, and complete description thereof.

My improvement in the art of making hollow staybolts consists in the manner and certain means employed for making the same, by which the manufacture of the article is so facilitated as to reduce the manual labor, while increasing the quantity of the product at a minimum of expense.

The mechanism and appliances for the purpose set forth consist in part of an oven or furnace arranged in relation to three high rolls operating conjointly, the said furnace being in line with one set of rolls and in the horizontal plane of the other set, whereby the stay-bolt bars or iron are heated, rolled, Welded, reheated, and rerolled to a given size with the hole formed upon a mandrel in rolling by one continuous operation.

That the invention may be fully seen and understood, reference willbe had to the following specifications and the annexed drawings.

Figure l is a vertical section of a set of threehigh rolls in connection with an especially-arranged oven or furnace used conjointly with the rolls in making stay-bolts. Fig. 2 is partially a plan view and partially a horizontal section of Fig. 1. Fig. 3 is a partial transverse section of the furnace in line 00 00, Fig. 2. Fig. 4 is a view ofa preliminary condition of the material, technically known as iron skelps, from which the stay-bolts are made.

Like letters of reference refer to like parts in the drawings and specifications.

In this manner of making hollow stay-bolts the material (iron or steel) is rolled or formed first into longitudinal semicircular skelps or bars.

In Fig. 4, a a represent two of such skelpbars, which are laid upon each others edges, and then fastened together by bands of wire or its equivalent means, in which state they are ready for reheating to a welding heat in a suitable furnace, (not shown,) to which heat the skelps are subjected to assure a perfect union of the two parts thereof. The Welding is accomplished by passing the two heated skelps between the rolls A, as seen in Fig. 1. A headed mandrel, B, introduced into the opening in the skelp, prevents the hole therein from being clogged up in rolling, the hole being first formed by the semicircular skelp-bars a a. The mandrel is forced into the hole a immediately after the two heated sections or skelps leave the furnace and while lying upon the table 0. As soon as the mandrel is inserted in the heated skelps, it is directed between the rolls A,and is allowed to pass in and over the bite of the rolls A, but is retained from passing through by the collar 12 of the mandrel bearing against the bars 0, which are secured across the end of the table 0 a certain distance apart to form a slot or passage for the mandrel. The collar b, bearing against the bars 0, retains the mandrel B in proper relation to the rollers A A; but the skelp-bar is drawn off from the mandrel by the action of the rolls.

After passing through the rolls A A under a welding heat the skelps are formed into staybolt iron or barsthat is, the rolls weld and round the skelps together. At the same time a free and smooth hole is formed in the inside by means of the mandrel B, as before stated. The skelps which are rolled and welded into staybolt iron are very nearly the desired size for the finished article; hence only one passage after the skelps are rolled into stay-bolt is necessary to finish the same to the exact dimensions required. Before this is done the iron must be reheated, and for this purpose a furnace is provided, it being arranged in proximity to the rolls A, and constructed in such manner that the iron as it comes from the rollsA can pass directly into the said furnace.

In Fig. 1, D indicates a vertical longitudinal section of the furnace, the fire-place E thereof having a fluted or corrugated bridge, F, formed directly over the said fire-place. The bridge F is made of suitable fire-proof material, the flutings therein being arranged to correspond with the grooves in the rolls A, standing in front of the furnace.

g. 3 illustrates a cross-section of the bridge F'and the flutings or grooves d. At the front part of the bridge F openings 6, Figs. 1 and 2, are provided for the heat to pass up through from the fire-place to the upper partor furnace, G, in which the iron from the rolls A is conveyed to be reheated, the smoke escaping through the chimney G.

The grooves in the rolls A are all of a uniform size; thus they can be used successively until the bridge-grooves are filled. During the time of conveying into each and all of the grooves a welded stay-bolt bar from the rolls A the first welded bar entered into the furnace Gin the groove will be sufficiently heated for the second rolling by the time that the last of the grooves d receives its welded bar from the rolls A. The first bar before mentioned is then withdrawn from the furnace and passed through an adjoining set of rolls, H, from the opposite of the entry in the rolls A, as seen in Fig. 2. Both the roll-trains A and H are driven jointly and simultaneously. After the furnace is filled, the first reheated bars are inserted in the rolls H at E, Fig. 1, as fast as the bars are withdrawn from the furnace for the second rolling. The welded bars from the rolls A take the place of each bar so re U moved, thus welding and rolling the skelps into a finished stay-bolt bar by one continuous operation.

When the bars are taken out from the furnace D, they are laid on a table, 0, in front of the rolls H, and a mandrel, B, of the correct size is put into the bar-hole before it is subjected to the finishing-rolls H, whichare grooved and so set as to reduce the bar to a smaller size than the first rolls will accomplish. The hollow bars after leaving the rolls H are then ready to be cut up into sections of varied lengths, as may be needed for stay-bolts.

I claim In the art of making metallic hollow staybolts, first, rolling and welding the heated skelps a a into hollow bars of a given size; second,passing the said bars immediately from the first set of rolls into a reheating-furnace, and, third, from the said furnace directly to the second set of rolls for final reduction by the consecutive and conjoint operation of the two sets of three-high rolls and an intermediate furnace,

arranged to cooperate as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM B. WEIL.

Witnesses:

W. H. BURRIDGE, B. F. EIBLER. 

